Thank you for taking time in filing the bug to make ubuntu better.
i can't reproducethis bug.
1). is this reproduce able ?
2). if so than please describe the specific steps to reproduce it.
attach the vedio of the bug.

Thanks for the bug report. This particular bug has already been reported and is a duplicate of bug 883516, so is being marked as such. Any further discussion regarding the bug should occur in the other report. Feel free to report any other bugs you may find.